清除Laravel的订单 [英] Clear Laravel's orderBy

问题描述

我有一个通用函数，可以为我提供通用查询集，例如:

I have a generic function which gives me generic querysets, something like:

class Model extends Eloquent {
  public static function get_queryset(){
    $queryset = self::where('foo','=','bar');
    // Do tons of stuff with the query and then...
    return $queryset->orderBy('somefield');
  }
}

此函数在我的项目中随处使用，但是在特定的地方，我需要使用此查询集，但要更改 ORDER BY，就像这样:

This function is used everywhere my project, but in a specific point I need to use this queryset but changing the ORDER BY, much like this:

public static function get_specific_field(){
  return self::get_queryset()->select('singlefield')->orderBy('singlefield');
}

如果我运行此代码，则由于"somefield"不在SELECTed字段上，因此ORDER BY只会追加到前一个代码上并生成无效的查询.即:

If I run this code, the ORDER BY will just append onto the previous and generate an invalid query, since the "somefield" is not on the SELECTed fields. i.e.:

SELECT singlefield FROM table ORDER BY somefield ASC, singlefield ASC

如何清除订单，以便重新使用查询集?

How do I clear the orderBy so I can just reuse querysets?

推荐答案

我同意应该在查询构建器中添加clearOrderBy()方法.但是，由于orderbys的注册表是Illuminate\Database\Query\Builder上的公共财产，因此您实际上可以今天自己将其清除.技巧是访问基本查询对象:

I agree there should be a clearOrderBy() method added to the query builder. However because the registry of orderbys is a public property on Illuminate\Database\Query\Builder you actually can clear it yourself today. The trick is getting access to the base query object:

$query = YourModel::where('status', 1)->orderBy('created_at','desc');
// ... lots of other code, something needs to reset the order by ...
$query->getQuery()->orders = null;
$query->orderBy('other_column', 'desc');

在其他时间，例如，在处理关系查询时，您需要访问基本查询(Illuminate\Database\Query\Query).例如:

At other times, for example when manipulating a relation query, you need to get to access the base query (Illuminate\Database\Query\Query). So for example:

$query = YourModel::find(1)->load('children', function ($query) {
    $query->getBaseQuery()->orders = null;
});

就这样.我也打算为clearOrderBy()提交PR.

Thats it. I plan to submit a PR for a clearOrderBy() as well.

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